Flow cytometric analysis of IgG production before treatment (thin profile) and 5 to 8 days after the fourth injection (bold profile), presented as the log fluorescence intensity of PE-conjugated secondary avidin-conjugated antibody.

Reactivity of the sera from patients 1, 4, 10, 11, and 13 to 21 against the JF cell line, from patients 11 and 13 against a GD$2low$ cell line, SK-N-SH, and from patient 20 against a GD$2high$ cell line, LAN-1, are presented.